Contemplating S10 purchase

[Cali72K20]

That's sounds like a fair price. I have a 1989 4.3 liter/700R4 combo too, it is almost too much for that little truck. Paint peeling is common on those years of GM trucks. The wheels will not interchange with a 2WD is kind of a bummer, the offset is different.
mine had an idle issue plus the front main seal and valve seals leak with over 130K on the odometer, it was an old USAF truck from Plant 42 in Palmdale, CA.

Yours looks like it has the Tahoe package, nice little truck.